The homebrew gunsmith saga continues, and it's just as bad as I thought it'd be! There's a little more leeway when you're crafting your own ammo, but messing with the wrong kind of powder is a dangerous way to go. Either those sinkers end up too small and you get blowby, or they're too large and you get a squib. The failure to cycle (called it, by the way...) is a symptom of significantly worse issues.